function initToggle()
{
    var myLinkArray = document.getElementsByTagName('a');
    for (i=0; i<myLinkArray.length; i++)
    {
        var myElemId = 'link'+i;

        if(document.getElementById(myElemId))
        {
           myElem = document.getElementById(myElemId);
           myElem.onclick = function()
           {
               tblId = this.id.replace(/link/g,'room');
               tbl = document.getElementById(tblId);
               if(tbl.style.display != 'block')
               {
                    tbl.style.display = 'block';
                    this.innerHTML = 'Hide Room Amenities';
               }
               else
               {
                    tbl.style.display = 'none';
                    this.innerHTML = 'Show Room Amenities';
               }
               return false;
           }
        }
    }
}

register_onload_event(initToggle);